The black shade refers to acidentical amino acids, the gray shade denotes amino acids with partial identity.
黑色阴影代表完全相同的氨基酸，灰色阴影表示部分相同的氨基酸。
When Old Chuan still hesitated, the man in black snatched his lantern and tore off its paper shade to wrap up the roll.
老栓还踌躇着；黑的人便抢过灯笼，一把扯下纸罩，裹了馒头，塞与老栓；一手抓过洋钱，捏一捏，转身去了。
It is traditionally the preserve of chic cocktail parties, but black is now the dress shade of choice for British brides, the Daily Mail reported.
黑色是高雅的鸡尾酒会的传统礼服颜色，但据《每日邮报》报道，英国新娘现在开始流行穿着黑色婚纱步入婚礼殿堂。
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